Vibration motor

Abstract

A vibration motor 100 of the present invention comprises a housing 100 having an outer housing 111 and an inner housing 115 being inwardly extended from the outer housing 111 , a magnet 130 being formed longer than the inner housing 115 and being fixedly combined to an outer periphery surface of the inner housing 115 , and an opposite output bearing 140 for rotatably supporting a rotating shaft 150 and being combined to the magnet 130 to be closely contacted with the inner periphery surface of the magnet 130 . The bearing 140 is disposed on the end of the inner housing 115 in contact and has a plurality of recesses 142 axially formed on the outer periphery surface thereof.

1 . A vibration motor, the motor comprising: 
 a housing having an outer housing and an inner housing being inwardly extended from the outer housing;    a magnet being formed longer than the inner housing and being fixedly combined to an outer periphery surface of the inner housing; and    a bearing for rotatably supporting a rotating shaft, the bearing being combined to the magnet to be closely contacted with the inner periphery surface of the magnet.    
   
   
       2 . The motor according to  claim 1 , wherein the bearing is disposed on the end of the inner housing in contact and has a plurality of recesses or a plurality of protrusions axially formed on the outer periphery surface thereof.  
   
   
       3 . The motor according to  claim 1 , wherein the bearing has a cylindrical body being combined with an inner periphery surface of the magnet and a disk-like body being combined with an end of the magnet, the cylindrical body having a plurality of recesses or a plurality of protrusions axially formed on the outer periphery surface thereof.  
   
   
       4 . The motor according to  claim 1 , wherein the bearing has a cylindrical body and an annular extension being outwardly extended from the cylindrical body in radial direction, the extension elastically supporting the magnet in radial direction.  
   
   
       5 . The motor according to  claim 4 , wherein the extension has a plurality of recesses or a plurality of protrusions axially formed on the outer periphery surface thereof.  
   
   
       6 . The motor according to  claim 4 , wherein the extension is disposed to be contacted with an end of the inner housing.  
   
   
       7 . The motor according to  claim 6 , wherein the extension has a plurality of recesses or a plurality of protrusions axially formed on the outer periphery surface thereof.